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Protein Structure


This quiz is based on the various aspects of the structure of protein molecules and amino acids.

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Multiple choice

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1.

How many different amino acids are found in proteins ?

  infinite

  27

  20

  30

  Half-n-half Clue
 

2.

The Quaternary structure of a protein is :

  its structure resulting from the union of more than one protein molecule, called subunit proteins.

  its amino acid sequence

  its structure resulting from interactions between amino acid side chains.

  its structure resulting from hydrogen bonds between the C=O and N-H groups of different amino acids.

  Half-n-half Clue
 

3.

Which of the following is not an aromatic amino acid ?

  Tryptophan

  Serine

  Phenylalanine

  Tyrosine

  Half-n-half Clue
 

4.

Successive amino acids in the polypeptide chains that make up a protein are held together by :

  interprotamine disulfide bonds

  N-glycosidic bonds

  peptide bonds

  phosphodiester bonds

  Half-n-half Clue
 

5.

Which of the following is not a type of protein secondary structure ?

  á-helix

  â-pleated sheet

  Turns

  third level folding to form small globules

  Half-n-half Clue
 

6.

Each protein has a particular 3D structure which is decided by its:

  Quaternary structure

  primary structure

  tertiary structure

  secondary structure

  Half-n-half Clue
 

7.

Infectious self-reproducing agents consisting only of protein, with no nucleic acids (hypothesized in 1982 by Nobel Laureate Stanley B. Prusiner) are called :

  proteomes

  exteins

  proteinoids

  Prions

  Half-n-half Clue
 


 
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